Remove the shells from the pistachios. Set aside some for serving and chop coarsely. Pour boiling water over the main mass and leave for 20 minutes to make the brown skins easier to remove. Prepare a frying pan, a blender or coffee grinder, a saucepan, and a container for freezing the dessert.
Prepare the main flavoring ingredient. Remove the skins from the pistachios and dry the peeled nuts in a frying pan over low heat for 5-7 minutes. Grind the peeled and dried nuts in a coffee grinder or blender.
Prepare the ice cream base. Beat the egg and sugar until smooth. Heat 250 ml of cream until hot, but do not boil. Gradually add hot cream into the egg mixture, stirring constantly. Whip the remaining cream into a thick foam. Combine all ingredients in one container, adding chopped pistachios. Place the mixture in the freezer for 4 hours.
In the absence of special ice cream bowls, serving in martini glasses will look no less impressive. Serve the ice cream garnished with coarsely chopped pistachios.